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Onkyo TX-NR646 silver

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A newer model has replaced this product:

Specifications and features

AirPlayAndroidBluetoothCompatible 3DDLNADolby AtmosDTS-HD Master AudioDTS:XHDCP 2.2HDMISpotifyUltra HD (4K)Upscaling 4KUSBWi-FiWorks with iPhone

Overview

Discover the best in home cinema with the TX-NR646 7.2-channel network A/V receiver, the first in its class to feature the incredible DTS:X and Dolby Atmos multidimensional audio formats. Onkyo’s high-current amplification system reproduces soundtracks through your speakers with maximum impact and fidelity, at 160 W/channel.

The UltraHD video capabilities are equally impressive, with eight HDMI connectors, including dedicated HDCP 2.2-compliant inputs for high-quality 4K video content and two HDMI outputs for video distribution to separate rooms.

The TX-NR646’s high-quality AKM 384 kHz/32-bit D/A converter brings not only movies but also music to life. Stream music effortlessly with built-in Wi-Fi, Bluetooth, AirPlay, or Internet music services, including Spotify Connect and Deezer.

Use the free Onkyo Remote App to stream music stored on your mobile device, browse and select tracks from online services, and control playback in two zones. Plus, for vinyl fans, the TX-NR646 features a phono equalizer input for connecting a turntable.

  • Highlights
    • DTS:X compatible
    • Supports Dolby Atmos format up to 5.1.2 channels
    • Power: 160 W per channel
    • High-current amplification design
    • 8 HDMI inputs/2 outputs, including 1 on the front (Ultra HD 4K/HDCP 2.2)
    • Bluetooth/Wi-Fi audio with Spotify and AirPlay
    • High-quality 384 kHz/32-bit D/A converter
    • AccuEQ room acoustic calibration

7.2-Channel Network A/V Receiver

  • Dynamic Power
    • 240 W (3 Ω, Front)
    • 210 W (4 Ω, Front)
    • 120 W (8 Ω, Front)

Amplifier

  • WRAT (Wide Range Amplifier Technology)

  • High-Current Massive Transformer H.C.P.S.

  • Separate Output Stage Circuitry

  • Optimum Gain Volume Circuitry

    • PLL (Phase Locked Loop) Jitter-Cleaning Technology

Processing

  • Dolby TrueHD and DTS-HD Master Audio Decoding
  • AK4458 384 kHz/32-bit DAC (8 Channels x 1)
  • Two 32-bit DSP Processing Engines
  • 4 DSP Modes for Gaming: Rock, Sports, Action, and RPG
  • Theater-Dimensional Function
  • CinemaFILTER, Direct Mode, Double Bass Function
  • Non-Scaling Configuration, Preset Listening Mode Memory

Measurements

  • THD+N (Total Harmonic Distortion + Noise) 0.08% (20 Hz–20 kHz, Half Power)
  • Damping Factor 60 (Front, 1 kHz, 8Ω)
  • Phono Overload 70 mV (MM, 1 kHz, 0.5%)
  • Frequency Response 10 Hz–100 kHz/ +1 dB, -3 dB (Direct Mode)
  • Speaker Impedance 4 or 6 Ω–16 Ω
  • Input Sensitivity and Impedance
    • 200 mV/47 kΩ (Line)
    • 3.5 mV/47 kΩ (Phono MM)
  • Tone Controls
    • ±10 dB, 20 Hz (Bass)
    • ±10 dB, 20 kHz (Treble)
  • Signal-to-Noise Ratio
    • 100 dB (Line, IHF-A)
    • 80 dB (Phono MM, IHF-A)

Connectivity

  • 8 HDMI Inputs (1 Front/7 Rear) and 2 Outputs
  • 2 Component Video Inputs, 3 Composite Video Inputs
  • 3 Digital Audio Inputs (2 Optical/1 Coaxial)
  • 8 Analog Audio Inputs
  • 1 Phono Input for Turntable
  • 2 Parallel Subwoofer Pre-Outs
  • 1 USB Port
  • 1 USB Mass Storage Class Device Playback
  • 1 Speaker Terminal with Position-Based Numbering

Tuner Section

  • 40 FM/AM Random Presets, DLNA 1.5 Certified
  • Reception Frequency Range
    • FM 87.5 MHz–108 MHz
    • AM 522 kHz–1,611 kHz

General

  • Power Supply AC 220–240V~, 50/60 Hz

Power Consumption

  • Electric 630 W
    • No-Sound 70 W
    • Standby 0.15 W

Dimensions (W × H × D)

  • Product: 435 × 173.5 × 329 mm
    • Packaging: 570 x 287 x 423 mm

Weight

  • Product: 9.4 kg
    • Packaging: 12.5 kg

Supplied Accessories

  • Indoor FM Antenna
    • AM Loop Antenna
    • Speaker Setup Microphone
    • Instruction Manual
    • Remote Control
    • 2 AA (R6) Batteries

User reviews

Stéphane

Very good product with easy adjustments, but temperamental ARC function. Advantageously replaces the previous 636 series, which gave me nothing but trouble, particularly because the French after-sales service was in liquidation.

Comment from February 02, 2021 — Experience from February 26, 2016

Automatically translated — Show original (French)
Très bon produit et facilités de réglage mais fonction ARC capricieuse. Remplace avantageusement la série précédente 636 avec laquelle je n'ai eu que des ennuis, notamment parce que le SAV France était en liquidation.

Bruno

Very very good product.

Comment from March 09, 2020 — Experience from December 07, 2015

Automatically translated — Show original (French)
Très très bon produit.

Michel

Nothing to complain about when it comes to the sound, which is the main thing for my use.
On the other hand, the remote control is not a model of ergonomics and there's another problem: the lack of contrast of the labels printed just above the buttons is problematic. You really need to be in full light and be well aligned for them to be readable. For me, the amp is in a cabinet that is open, yet I had to stick labels on it, which is not very classy.

Comment from November 27, 2018 — Experience from December 22, 2015

Automatically translated — Show original (French)
Rien à redire quand au son, c'est l'essentiel pour mon usage.
Par contre la télécommande n'est pas un modèle d'ergonomie et autre problème : le manque de contraste des libellés inscrits juste au dessus des touches est problématique. Il faut vraiment être en pleine lumière et être bien dans l'axe pour qu'ils soient lisibles. Pour moi, l'ampli est dans un meuble pourtant ouvert, j'ai du coller des étiquettes, ce qui n'est pas très classe.
  • Eco-contribution of €1 included in the sale price.
  • GTIN / EAN: 4961330039312
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